They both groaned as she slowly slid further down onto him. After a few inches she rose back up and then slid back down. As more and more of her brother’s nearly eight inch length pushed into her, Heather began breathing carefully out through puckered lips, savoring the illicit penetration. When he was sheathed inside her completely, her shoulders slowly relaxed and she settled herself onto him comfortably.
They stared at each other silently, letting the moment sink in. There was no going back now. Neither of them could ever forget this day.
That’s when I realized I was grinding my teeth together. The incest part didn’t bother me but, for some reason, this was harder than watching Bobbie with Samantha. That had just been fun. Sex. I could already tell this was different. Heather was making love to another man. It was thrilling and nauseating to watch at the same time.
Samantha sensed my anxiety and joined me. She took my hand and pulled it up to her mouth then kissed it, her fingers lacing through mine. Samantha’s calm acceptance washed over me. She was fine with what Heather and Bobbie were doing and it helped me get a grip on myself. After jealousy came shame at being hypocritical. Heather had been sharing me with Sammie for almost as long as we’d been together. Surely I could share her now. After shame came acceptance. If I just looked at them, what these two were doing was beautiful in its own way.
Heather was smiling warmly down at her brother. “So Bobbie, this is what a girl feels like. You’re in a girl. Way up deep too. You’ve got a nice cock little bro’. How does it feel for you?”
“Like a dream,” Bobbie sighed.
“I’m going to ride you a little now. Ready?”
“What should I do?”
“Absolutely nothing, your big sister is in charge.”
Bobbie smiled. “I think I can manage that.”
Heather rose off him and sank back down with a groan. She rolled her hips in circles, grinding against him and swirling his shaft around inside her hot depths.
“So, what do you think? Still going to be an ass man, Bobbie?”
“Uh uh.”
“So you like pussy now?” She rose and fell on him again.
“Yeah.”
“I want to hear you say it. Tell me you love pussy.” She rose and fell on him again, this time more quickly.
“I love pussy.”
“Tell me you love my pussy,” she teased.
“I love my sister’s pussy.”
“You love your sister’s secret pussy.”
“I love my sister’s secret pussy!” he howled.
“Good boy,” she giggled. Heather closed her eyes and began to hump up and down freely on her brother. She was breathing through her nose rhythmically, pacing herself. She blindly reached for his hands and placed them on her hips.
Bobbie was watching her shirt-covered chest bob up and down in time with her steady posting. His sister was giving him the ride of his life. I didn’t envy Bobbie’s next several girlfriends. How the hell were they ever going to compete with this?
As it turned out, Heather was indeed giving her brother too good a ride. With no warning, Bobbie’s hips shot upwards and he growled.
Heather’s eyes flew open as she realized her brother was coming way earlier than she’d expected. Smirking, she bounced herself up and down on him, letting him enjoy his orgasm and keeping him inside her as he erupted. When he’d finished, she settled herself down onto him again, keeping him buried inside her and trapping his cum within.